Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Cryptographic API. |
| 3 | * |
| 4 | * Support for OMAP AES HW acceleration. |
| 5 | * |
| 6 | * Copyright (c) 2010 Nokia Corporation |
| 7 | * Author: Dmitry Kasatkin <dmitry.kasatkin@nokia.com> |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 8 | * Copyright (c) 2011 Texas Instruments Incorporated |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as published |
| 12 | * by the Free Software Foundation. |
| 13 | * |
| 14 | */ |
| 15 | |
Joel Fernandes | 016af9b | 2013-08-18 00:56:11 -0500 | [diff] [blame] | 16 | #define pr_fmt(fmt) "%20s: " fmt, __func__ |
| 17 | #define prn(num) pr_debug(#num "=%d\n", num) |
| 18 | #define prx(num) pr_debug(#num "=%x\n", num) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 19 | |
| 20 | #include <linux/err.h> |
| 21 | #include <linux/module.h> |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/errno.h> |
| 24 | #include <linux/kernel.h> |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/scatterlist.h> |
| 27 | #include <linux/dma-mapping.h> |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 28 | #include <linux/dmaengine.h> |
| 29 | #include <linux/omap-dma.h> |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 30 | #include <linux/pm_runtime.h> |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 31 | #include <linux/of.h> |
| 32 | #include <linux/of_device.h> |
| 33 | #include <linux/of_address.h> |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 34 | #include <linux/io.h> |
| 35 | #include <linux/crypto.h> |
| 36 | #include <linux/interrupt.h> |
| 37 | #include <crypto/scatterwalk.h> |
| 38 | #include <crypto/aes.h> |
| 39 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 40 | #define DST_MAXBURST 4 |
| 41 | #define DMA_MIN (DST_MAXBURST * sizeof(u32)) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 42 | |
Joel Fernandes | 1bf95cc | 2013-08-17 21:42:29 -0500 | [diff] [blame] | 43 | #define _calc_walked(inout) (dd->inout##_walk.offset - dd->inout##_sg->offset) |
| 44 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 45 | /* OMAP TRM gives bitfields as start:end, where start is the higher bit |
| 46 | number. For example 7:0 */ |
| 47 | #define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end)) |
| 48 | #define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end)) |
| 49 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 50 | #define AES_REG_KEY(dd, x) ((dd)->pdata->key_ofs - \ |
| 51 | ((x ^ 0x01) * 0x04)) |
| 52 | #define AES_REG_IV(dd, x) ((dd)->pdata->iv_ofs + ((x) * 0x04)) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 53 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 54 | #define AES_REG_CTRL(dd) ((dd)->pdata->ctrl_ofs) |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 55 | #define AES_REG_CTRL_CTR_WIDTH_MASK (3 << 7) |
| 56 | #define AES_REG_CTRL_CTR_WIDTH_32 (0 << 7) |
| 57 | #define AES_REG_CTRL_CTR_WIDTH_64 (1 << 7) |
| 58 | #define AES_REG_CTRL_CTR_WIDTH_96 (2 << 7) |
| 59 | #define AES_REG_CTRL_CTR_WIDTH_128 (3 << 7) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 60 | #define AES_REG_CTRL_CTR (1 << 6) |
| 61 | #define AES_REG_CTRL_CBC (1 << 5) |
| 62 | #define AES_REG_CTRL_KEY_SIZE (3 << 3) |
| 63 | #define AES_REG_CTRL_DIRECTION (1 << 2) |
| 64 | #define AES_REG_CTRL_INPUT_READY (1 << 1) |
| 65 | #define AES_REG_CTRL_OUTPUT_READY (1 << 0) |
| 66 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 67 | #define AES_REG_DATA_N(dd, x) ((dd)->pdata->data_ofs + ((x) * 0x04)) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 68 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 69 | #define AES_REG_REV(dd) ((dd)->pdata->rev_ofs) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 70 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 71 | #define AES_REG_MASK(dd) ((dd)->pdata->mask_ofs) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 72 | #define AES_REG_MASK_SIDLE (1 << 6) |
| 73 | #define AES_REG_MASK_START (1 << 5) |
| 74 | #define AES_REG_MASK_DMA_OUT_EN (1 << 3) |
| 75 | #define AES_REG_MASK_DMA_IN_EN (1 << 2) |
| 76 | #define AES_REG_MASK_SOFTRESET (1 << 1) |
| 77 | #define AES_REG_AUTOIDLE (1 << 0) |
| 78 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 79 | #define AES_REG_LENGTH_N(x) (0x54 + ((x) * 0x04)) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 80 | |
Joel Fernandes | 6721675 | 2013-08-17 21:42:28 -0500 | [diff] [blame] | 81 | #define AES_REG_IRQ_STATUS(dd) ((dd)->pdata->irq_status_ofs) |
| 82 | #define AES_REG_IRQ_ENABLE(dd) ((dd)->pdata->irq_enable_ofs) |
| 83 | #define AES_REG_IRQ_DATA_IN BIT(1) |
| 84 | #define AES_REG_IRQ_DATA_OUT BIT(2) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 85 | #define DEFAULT_TIMEOUT (5*HZ) |
| 86 | |
| 87 | #define FLAGS_MODE_MASK 0x000f |
| 88 | #define FLAGS_ENCRYPT BIT(0) |
| 89 | #define FLAGS_CBC BIT(1) |
| 90 | #define FLAGS_GIV BIT(2) |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 91 | #define FLAGS_CTR BIT(3) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 92 | |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 93 | #define FLAGS_INIT BIT(4) |
| 94 | #define FLAGS_FAST BIT(5) |
| 95 | #define FLAGS_BUSY BIT(6) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 96 | |
Joel Fernandes | 1bf95cc | 2013-08-17 21:42:29 -0500 | [diff] [blame] | 97 | #define AES_BLOCK_WORDS (AES_BLOCK_SIZE >> 2) |
| 98 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 99 | struct omap_aes_ctx { |
| 100 | struct omap_aes_dev *dd; |
| 101 | |
| 102 | int keylen; |
| 103 | u32 key[AES_KEYSIZE_256 / sizeof(u32)]; |
| 104 | unsigned long flags; |
| 105 | }; |
| 106 | |
| 107 | struct omap_aes_reqctx { |
| 108 | unsigned long mode; |
| 109 | }; |
| 110 | |
| 111 | #define OMAP_AES_QUEUE_LENGTH 1 |
| 112 | #define OMAP_AES_CACHE_SIZE 0 |
| 113 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 114 | struct omap_aes_algs_info { |
| 115 | struct crypto_alg *algs_list; |
| 116 | unsigned int size; |
| 117 | unsigned int registered; |
| 118 | }; |
| 119 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 120 | struct omap_aes_pdata { |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 121 | struct omap_aes_algs_info *algs_info; |
| 122 | unsigned int algs_info_size; |
| 123 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 124 | void (*trigger)(struct omap_aes_dev *dd, int length); |
| 125 | |
| 126 | u32 key_ofs; |
| 127 | u32 iv_ofs; |
| 128 | u32 ctrl_ofs; |
| 129 | u32 data_ofs; |
| 130 | u32 rev_ofs; |
| 131 | u32 mask_ofs; |
Joel Fernandes | 6721675 | 2013-08-17 21:42:28 -0500 | [diff] [blame] | 132 | u32 irq_enable_ofs; |
| 133 | u32 irq_status_ofs; |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 134 | |
| 135 | u32 dma_enable_in; |
| 136 | u32 dma_enable_out; |
| 137 | u32 dma_start; |
| 138 | |
| 139 | u32 major_mask; |
| 140 | u32 major_shift; |
| 141 | u32 minor_mask; |
| 142 | u32 minor_shift; |
| 143 | }; |
| 144 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 145 | struct omap_aes_dev { |
| 146 | struct list_head list; |
| 147 | unsigned long phys_base; |
Dmitry Kasatkin | efce41b | 2010-11-30 10:13:32 +0200 | [diff] [blame] | 148 | void __iomem *io_base; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 149 | struct omap_aes_ctx *ctx; |
| 150 | struct device *dev; |
| 151 | unsigned long flags; |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 152 | int err; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 153 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 154 | spinlock_t lock; |
| 155 | struct crypto_queue queue; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 156 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 157 | struct tasklet_struct done_task; |
| 158 | struct tasklet_struct queue_task; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 159 | |
| 160 | struct ablkcipher_request *req; |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 161 | |
| 162 | /* |
| 163 | * total is used by PIO mode for book keeping so introduce |
| 164 | * variable total_save as need it to calc page_order |
| 165 | */ |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 166 | size_t total; |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 167 | size_t total_save; |
| 168 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 169 | struct scatterlist *in_sg; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 170 | struct scatterlist *out_sg; |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 171 | |
| 172 | /* Buffers for copying for unaligned cases */ |
| 173 | struct scatterlist in_sgl; |
| 174 | struct scatterlist out_sgl; |
| 175 | struct scatterlist *orig_out; |
| 176 | int sgs_copied; |
| 177 | |
Joel Fernandes | 1bf95cc | 2013-08-17 21:42:29 -0500 | [diff] [blame] | 178 | struct scatter_walk in_walk; |
| 179 | struct scatter_walk out_walk; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 180 | int dma_in; |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 181 | struct dma_chan *dma_lch_in; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 182 | int dma_out; |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 183 | struct dma_chan *dma_lch_out; |
Joel Fernandes | e77c756 | 2013-08-17 21:42:24 -0500 | [diff] [blame] | 184 | int in_sg_len; |
| 185 | int out_sg_len; |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 186 | int pio_only; |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 187 | const struct omap_aes_pdata *pdata; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 188 | }; |
| 189 | |
| 190 | /* keep registered devices data here */ |
| 191 | static LIST_HEAD(dev_list); |
| 192 | static DEFINE_SPINLOCK(list_lock); |
| 193 | |
Joel Fernandes | 016af9b | 2013-08-18 00:56:11 -0500 | [diff] [blame] | 194 | #ifdef DEBUG |
| 195 | #define omap_aes_read(dd, offset) \ |
| 196 | ({ \ |
| 197 | int _read_ret; \ |
| 198 | _read_ret = __raw_readl(dd->io_base + offset); \ |
| 199 | pr_debug("omap_aes_read(" #offset "=%#x)= %#x\n", \ |
| 200 | offset, _read_ret); \ |
| 201 | _read_ret; \ |
| 202 | }) |
| 203 | #else |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 204 | static inline u32 omap_aes_read(struct omap_aes_dev *dd, u32 offset) |
| 205 | { |
| 206 | return __raw_readl(dd->io_base + offset); |
| 207 | } |
Joel Fernandes | 016af9b | 2013-08-18 00:56:11 -0500 | [diff] [blame] | 208 | #endif |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 209 | |
Joel Fernandes | 016af9b | 2013-08-18 00:56:11 -0500 | [diff] [blame] | 210 | #ifdef DEBUG |
| 211 | #define omap_aes_write(dd, offset, value) \ |
| 212 | do { \ |
| 213 | pr_debug("omap_aes_write(" #offset "=%#x) value=%#x\n", \ |
| 214 | offset, value); \ |
| 215 | __raw_writel(value, dd->io_base + offset); \ |
| 216 | } while (0) |
| 217 | #else |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 218 | static inline void omap_aes_write(struct omap_aes_dev *dd, u32 offset, |
| 219 | u32 value) |
| 220 | { |
| 221 | __raw_writel(value, dd->io_base + offset); |
| 222 | } |
Joel Fernandes | 016af9b | 2013-08-18 00:56:11 -0500 | [diff] [blame] | 223 | #endif |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 224 | |
| 225 | static inline void omap_aes_write_mask(struct omap_aes_dev *dd, u32 offset, |
| 226 | u32 value, u32 mask) |
| 227 | { |
| 228 | u32 val; |
| 229 | |
| 230 | val = omap_aes_read(dd, offset); |
| 231 | val &= ~mask; |
| 232 | val |= value; |
| 233 | omap_aes_write(dd, offset, val); |
| 234 | } |
| 235 | |
| 236 | static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset, |
| 237 | u32 *value, int count) |
| 238 | { |
| 239 | for (; count--; value++, offset += 4) |
| 240 | omap_aes_write(dd, offset, *value); |
| 241 | } |
| 242 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 243 | static int omap_aes_hw_init(struct omap_aes_dev *dd) |
| 244 | { |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 245 | if (!(dd->flags & FLAGS_INIT)) { |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 246 | dd->flags |= FLAGS_INIT; |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 247 | dd->err = 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 248 | } |
| 249 | |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 250 | return 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 251 | } |
| 252 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 253 | static int omap_aes_write_ctrl(struct omap_aes_dev *dd) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 254 | { |
| 255 | unsigned int key32; |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 256 | int i, err; |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 257 | u32 val, mask = 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 258 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 259 | err = omap_aes_hw_init(dd); |
| 260 | if (err) |
| 261 | return err; |
| 262 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 263 | key32 = dd->ctx->keylen / sizeof(u32); |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 264 | |
| 265 | /* it seems a key should always be set even if it has not changed */ |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 266 | for (i = 0; i < key32; i++) { |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 267 | omap_aes_write(dd, AES_REG_KEY(dd, i), |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 268 | __le32_to_cpu(dd->ctx->key[i])); |
| 269 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 270 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 271 | if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info) |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 272 | omap_aes_write_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4); |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 273 | |
| 274 | val = FLD_VAL(((dd->ctx->keylen >> 3) - 1), 4, 3); |
| 275 | if (dd->flags & FLAGS_CBC) |
| 276 | val |= AES_REG_CTRL_CBC; |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 277 | if (dd->flags & FLAGS_CTR) { |
Joel Fernandes | 8ed49c7 | 2013-10-29 17:37:38 -0500 | [diff] [blame] | 278 | val |= AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_128; |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 279 | mask = AES_REG_CTRL_CTR | AES_REG_CTRL_CTR_WIDTH_MASK; |
| 280 | } |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 281 | if (dd->flags & FLAGS_ENCRYPT) |
| 282 | val |= AES_REG_CTRL_DIRECTION; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 283 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 284 | mask |= AES_REG_CTRL_CBC | AES_REG_CTRL_DIRECTION | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 285 | AES_REG_CTRL_KEY_SIZE; |
| 286 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 287 | omap_aes_write_mask(dd, AES_REG_CTRL(dd), val, mask); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 288 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 289 | return 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 290 | } |
| 291 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 292 | static void omap_aes_dma_trigger_omap2(struct omap_aes_dev *dd, int length) |
| 293 | { |
| 294 | u32 mask, val; |
| 295 | |
| 296 | val = dd->pdata->dma_start; |
| 297 | |
| 298 | if (dd->dma_lch_out != NULL) |
| 299 | val |= dd->pdata->dma_enable_out; |
| 300 | if (dd->dma_lch_in != NULL) |
| 301 | val |= dd->pdata->dma_enable_in; |
| 302 | |
| 303 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | |
| 304 | dd->pdata->dma_start; |
| 305 | |
| 306 | omap_aes_write_mask(dd, AES_REG_MASK(dd), val, mask); |
| 307 | |
| 308 | } |
| 309 | |
| 310 | static void omap_aes_dma_trigger_omap4(struct omap_aes_dev *dd, int length) |
| 311 | { |
| 312 | omap_aes_write(dd, AES_REG_LENGTH_N(0), length); |
| 313 | omap_aes_write(dd, AES_REG_LENGTH_N(1), 0); |
| 314 | |
| 315 | omap_aes_dma_trigger_omap2(dd, length); |
| 316 | } |
| 317 | |
| 318 | static void omap_aes_dma_stop(struct omap_aes_dev *dd) |
| 319 | { |
| 320 | u32 mask; |
| 321 | |
| 322 | mask = dd->pdata->dma_enable_out | dd->pdata->dma_enable_in | |
| 323 | dd->pdata->dma_start; |
| 324 | |
| 325 | omap_aes_write_mask(dd, AES_REG_MASK(dd), 0, mask); |
| 326 | } |
| 327 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 328 | static struct omap_aes_dev *omap_aes_find_dev(struct omap_aes_ctx *ctx) |
| 329 | { |
| 330 | struct omap_aes_dev *dd = NULL, *tmp; |
| 331 | |
| 332 | spin_lock_bh(&list_lock); |
| 333 | if (!ctx->dd) { |
| 334 | list_for_each_entry(tmp, &dev_list, list) { |
| 335 | /* FIXME: take fist available aes core */ |
| 336 | dd = tmp; |
| 337 | break; |
| 338 | } |
| 339 | ctx->dd = dd; |
| 340 | } else { |
| 341 | /* already found before */ |
| 342 | dd = ctx->dd; |
| 343 | } |
| 344 | spin_unlock_bh(&list_lock); |
| 345 | |
| 346 | return dd; |
| 347 | } |
| 348 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 349 | static void omap_aes_dma_out_callback(void *data) |
| 350 | { |
| 351 | struct omap_aes_dev *dd = data; |
| 352 | |
| 353 | /* dma_lch_out - completed */ |
| 354 | tasklet_schedule(&dd->done_task); |
| 355 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 356 | |
| 357 | static int omap_aes_dma_init(struct omap_aes_dev *dd) |
| 358 | { |
| 359 | int err = -ENOMEM; |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 360 | dma_cap_mask_t mask; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 361 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 362 | dd->dma_lch_out = NULL; |
| 363 | dd->dma_lch_in = NULL; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 364 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 365 | dma_cap_zero(mask); |
| 366 | dma_cap_set(DMA_SLAVE, mask); |
| 367 | |
Mark A. Greer | b4b87a9 | 2013-01-08 11:57:45 -0700 | [diff] [blame] | 368 | dd->dma_lch_in = dma_request_slave_channel_compat(mask, |
| 369 | omap_dma_filter_fn, |
| 370 | &dd->dma_in, |
| 371 | dd->dev, "rx"); |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 372 | if (!dd->dma_lch_in) { |
| 373 | dev_err(dd->dev, "Unable to request in DMA channel\n"); |
| 374 | goto err_dma_in; |
| 375 | } |
| 376 | |
Mark A. Greer | b4b87a9 | 2013-01-08 11:57:45 -0700 | [diff] [blame] | 377 | dd->dma_lch_out = dma_request_slave_channel_compat(mask, |
| 378 | omap_dma_filter_fn, |
| 379 | &dd->dma_out, |
| 380 | dd->dev, "tx"); |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 381 | if (!dd->dma_lch_out) { |
| 382 | dev_err(dd->dev, "Unable to request out DMA channel\n"); |
| 383 | goto err_dma_out; |
| 384 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 385 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 386 | return 0; |
| 387 | |
| 388 | err_dma_out: |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 389 | dma_release_channel(dd->dma_lch_in); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 390 | err_dma_in: |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 391 | if (err) |
| 392 | pr_err("error: %d\n", err); |
| 393 | return err; |
| 394 | } |
| 395 | |
| 396 | static void omap_aes_dma_cleanup(struct omap_aes_dev *dd) |
| 397 | { |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 398 | dma_release_channel(dd->dma_lch_out); |
| 399 | dma_release_channel(dd->dma_lch_in); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | static void sg_copy_buf(void *buf, struct scatterlist *sg, |
| 403 | unsigned int start, unsigned int nbytes, int out) |
| 404 | { |
| 405 | struct scatter_walk walk; |
| 406 | |
| 407 | if (!nbytes) |
| 408 | return; |
| 409 | |
| 410 | scatterwalk_start(&walk, sg); |
| 411 | scatterwalk_advance(&walk, start); |
| 412 | scatterwalk_copychunks(buf, &walk, nbytes, out); |
| 413 | scatterwalk_done(&walk, out, 0); |
| 414 | } |
| 415 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 416 | static int omap_aes_crypt_dma(struct crypto_tfm *tfm, |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 417 | struct scatterlist *in_sg, struct scatterlist *out_sg, |
| 418 | int in_sg_len, int out_sg_len) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 419 | { |
| 420 | struct omap_aes_ctx *ctx = crypto_tfm_ctx(tfm); |
| 421 | struct omap_aes_dev *dd = ctx->dd; |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 422 | struct dma_async_tx_descriptor *tx_in, *tx_out; |
| 423 | struct dma_slave_config cfg; |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 424 | int ret; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 425 | |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 426 | if (dd->pio_only) { |
| 427 | scatterwalk_start(&dd->in_walk, dd->in_sg); |
| 428 | scatterwalk_start(&dd->out_walk, dd->out_sg); |
| 429 | |
| 430 | /* Enable DATAIN interrupt and let it take |
| 431 | care of the rest */ |
| 432 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); |
| 433 | return 0; |
| 434 | } |
| 435 | |
Joel Fernandes | 0a64171 | 2013-08-17 21:42:26 -0500 | [diff] [blame] | 436 | dma_sync_sg_for_device(dd->dev, dd->in_sg, in_sg_len, DMA_TO_DEVICE); |
| 437 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 438 | memset(&cfg, 0, sizeof(cfg)); |
| 439 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 440 | cfg.src_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); |
| 441 | cfg.dst_addr = dd->phys_base + AES_REG_DATA_N(dd, 0); |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 442 | cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 443 | cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 444 | cfg.src_maxburst = DST_MAXBURST; |
| 445 | cfg.dst_maxburst = DST_MAXBURST; |
| 446 | |
| 447 | /* IN */ |
| 448 | ret = dmaengine_slave_config(dd->dma_lch_in, &cfg); |
| 449 | if (ret) { |
| 450 | dev_err(dd->dev, "can't configure IN dmaengine slave: %d\n", |
| 451 | ret); |
| 452 | return ret; |
| 453 | } |
| 454 | |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 455 | tx_in = dmaengine_prep_slave_sg(dd->dma_lch_in, in_sg, in_sg_len, |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 456 | DMA_MEM_TO_DEV, |
| 457 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
| 458 | if (!tx_in) { |
| 459 | dev_err(dd->dev, "IN prep_slave_sg() failed\n"); |
| 460 | return -EINVAL; |
| 461 | } |
| 462 | |
| 463 | /* No callback necessary */ |
| 464 | tx_in->callback_param = dd; |
| 465 | |
| 466 | /* OUT */ |
| 467 | ret = dmaengine_slave_config(dd->dma_lch_out, &cfg); |
| 468 | if (ret) { |
| 469 | dev_err(dd->dev, "can't configure OUT dmaengine slave: %d\n", |
| 470 | ret); |
| 471 | return ret; |
| 472 | } |
| 473 | |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 474 | tx_out = dmaengine_prep_slave_sg(dd->dma_lch_out, out_sg, out_sg_len, |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 475 | DMA_DEV_TO_MEM, |
| 476 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); |
| 477 | if (!tx_out) { |
| 478 | dev_err(dd->dev, "OUT prep_slave_sg() failed\n"); |
| 479 | return -EINVAL; |
| 480 | } |
| 481 | |
| 482 | tx_out->callback = omap_aes_dma_out_callback; |
| 483 | tx_out->callback_param = dd; |
| 484 | |
| 485 | dmaengine_submit(tx_in); |
| 486 | dmaengine_submit(tx_out); |
| 487 | |
| 488 | dma_async_issue_pending(dd->dma_lch_in); |
| 489 | dma_async_issue_pending(dd->dma_lch_out); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 490 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 491 | /* start DMA */ |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 492 | dd->pdata->trigger(dd, dd->total); |
Dmitry Kasatkin | 83ea7e0 | 2010-11-30 10:13:31 +0200 | [diff] [blame] | 493 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | static int omap_aes_crypt_dma_start(struct omap_aes_dev *dd) |
| 498 | { |
| 499 | struct crypto_tfm *tfm = crypto_ablkcipher_tfm( |
| 500 | crypto_ablkcipher_reqtfm(dd->req)); |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 501 | int err; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 502 | |
| 503 | pr_debug("total: %d\n", dd->total); |
| 504 | |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 505 | if (!dd->pio_only) { |
| 506 | err = dma_map_sg(dd->dev, dd->in_sg, dd->in_sg_len, |
| 507 | DMA_TO_DEVICE); |
| 508 | if (!err) { |
| 509 | dev_err(dd->dev, "dma_map_sg() error\n"); |
| 510 | return -EINVAL; |
| 511 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 512 | |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 513 | err = dma_map_sg(dd->dev, dd->out_sg, dd->out_sg_len, |
| 514 | DMA_FROM_DEVICE); |
| 515 | if (!err) { |
| 516 | dev_err(dd->dev, "dma_map_sg() error\n"); |
| 517 | return -EINVAL; |
| 518 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 519 | } |
| 520 | |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 521 | err = omap_aes_crypt_dma(tfm, dd->in_sg, dd->out_sg, dd->in_sg_len, |
| 522 | dd->out_sg_len); |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 523 | if (err && !dd->pio_only) { |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 524 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
| 525 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, |
| 526 | DMA_FROM_DEVICE); |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 527 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 528 | |
| 529 | return err; |
| 530 | } |
| 531 | |
| 532 | static void omap_aes_finish_req(struct omap_aes_dev *dd, int err) |
| 533 | { |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 534 | struct ablkcipher_request *req = dd->req; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 535 | |
| 536 | pr_debug("err: %d\n", err); |
| 537 | |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 538 | dd->flags &= ~FLAGS_BUSY; |
| 539 | |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 540 | req->base.complete(&req->base, err); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | static int omap_aes_crypt_dma_stop(struct omap_aes_dev *dd) |
| 544 | { |
| 545 | int err = 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 546 | |
| 547 | pr_debug("total: %d\n", dd->total); |
| 548 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 549 | omap_aes_dma_stop(dd); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 550 | |
Mark A. Greer | ebedbf7 | 2013-01-08 11:57:42 -0700 | [diff] [blame] | 551 | dmaengine_terminate_all(dd->dma_lch_in); |
| 552 | dmaengine_terminate_all(dd->dma_lch_out); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 553 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 554 | return err; |
| 555 | } |
| 556 | |
Sachin Kamat | 034568e | 2013-09-13 17:06:46 +0530 | [diff] [blame] | 557 | static int omap_aes_check_aligned(struct scatterlist *sg) |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 558 | { |
| 559 | while (sg) { |
| 560 | if (!IS_ALIGNED(sg->offset, 4)) |
| 561 | return -1; |
| 562 | if (!IS_ALIGNED(sg->length, AES_BLOCK_SIZE)) |
| 563 | return -1; |
| 564 | sg = sg_next(sg); |
| 565 | } |
| 566 | return 0; |
| 567 | } |
| 568 | |
Sachin Kamat | 034568e | 2013-09-13 17:06:46 +0530 | [diff] [blame] | 569 | static int omap_aes_copy_sgs(struct omap_aes_dev *dd) |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 570 | { |
| 571 | void *buf_in, *buf_out; |
| 572 | int pages; |
| 573 | |
| 574 | pages = get_order(dd->total); |
| 575 | |
| 576 | buf_in = (void *)__get_free_pages(GFP_ATOMIC, pages); |
| 577 | buf_out = (void *)__get_free_pages(GFP_ATOMIC, pages); |
| 578 | |
| 579 | if (!buf_in || !buf_out) { |
| 580 | pr_err("Couldn't allocated pages for unaligned cases.\n"); |
| 581 | return -1; |
| 582 | } |
| 583 | |
| 584 | dd->orig_out = dd->out_sg; |
| 585 | |
| 586 | sg_copy_buf(buf_in, dd->in_sg, 0, dd->total, 0); |
| 587 | |
| 588 | sg_init_table(&dd->in_sgl, 1); |
| 589 | sg_set_buf(&dd->in_sgl, buf_in, dd->total); |
| 590 | dd->in_sg = &dd->in_sgl; |
| 591 | |
| 592 | sg_init_table(&dd->out_sgl, 1); |
| 593 | sg_set_buf(&dd->out_sgl, buf_out, dd->total); |
| 594 | dd->out_sg = &dd->out_sgl; |
| 595 | |
| 596 | return 0; |
| 597 | } |
| 598 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 599 | static int omap_aes_handle_queue(struct omap_aes_dev *dd, |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 600 | struct ablkcipher_request *req) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 601 | { |
| 602 | struct crypto_async_request *async_req, *backlog; |
| 603 | struct omap_aes_ctx *ctx; |
| 604 | struct omap_aes_reqctx *rctx; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 605 | unsigned long flags; |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 606 | int err, ret = 0; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 607 | |
| 608 | spin_lock_irqsave(&dd->lock, flags); |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 609 | if (req) |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 610 | ret = ablkcipher_enqueue_request(&dd->queue, req); |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 611 | if (dd->flags & FLAGS_BUSY) { |
| 612 | spin_unlock_irqrestore(&dd->lock, flags); |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 613 | return ret; |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 614 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 615 | backlog = crypto_get_backlog(&dd->queue); |
| 616 | async_req = crypto_dequeue_request(&dd->queue); |
Dmitry Kasatkin | eeb2b20 | 2010-11-30 10:13:28 +0200 | [diff] [blame] | 617 | if (async_req) |
| 618 | dd->flags |= FLAGS_BUSY; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 619 | spin_unlock_irqrestore(&dd->lock, flags); |
| 620 | |
| 621 | if (!async_req) |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 622 | return ret; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 623 | |
| 624 | if (backlog) |
| 625 | backlog->complete(backlog, -EINPROGRESS); |
| 626 | |
| 627 | req = ablkcipher_request_cast(async_req); |
| 628 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 629 | /* assign new request to device */ |
| 630 | dd->req = req; |
| 631 | dd->total = req->nbytes; |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 632 | dd->total_save = req->nbytes; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 633 | dd->in_sg = req->src; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 634 | dd->out_sg = req->dst; |
| 635 | |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 636 | if (omap_aes_check_aligned(dd->in_sg) || |
| 637 | omap_aes_check_aligned(dd->out_sg)) { |
| 638 | if (omap_aes_copy_sgs(dd)) |
| 639 | pr_err("Failed to copy SGs for unaligned cases\n"); |
| 640 | dd->sgs_copied = 1; |
| 641 | } else { |
| 642 | dd->sgs_copied = 0; |
| 643 | } |
| 644 | |
Joel Fernandes | e77c756 | 2013-08-17 21:42:24 -0500 | [diff] [blame] | 645 | dd->in_sg_len = scatterwalk_bytes_sglen(dd->in_sg, dd->total); |
| 646 | dd->out_sg_len = scatterwalk_bytes_sglen(dd->out_sg, dd->total); |
| 647 | BUG_ON(dd->in_sg_len < 0 || dd->out_sg_len < 0); |
| 648 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 649 | rctx = ablkcipher_request_ctx(req); |
| 650 | ctx = crypto_ablkcipher_ctx(crypto_ablkcipher_reqtfm(req)); |
| 651 | rctx->mode &= FLAGS_MODE_MASK; |
| 652 | dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode; |
| 653 | |
Dmitry Kasatkin | 67a730c | 2010-11-30 10:13:30 +0200 | [diff] [blame] | 654 | dd->ctx = ctx; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 655 | ctx->dd = dd; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 656 | |
Dmitry Kasatkin | 83ea7e0 | 2010-11-30 10:13:31 +0200 | [diff] [blame] | 657 | err = omap_aes_write_ctrl(dd); |
| 658 | if (!err) |
| 659 | err = omap_aes_crypt_dma_start(dd); |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 660 | if (err) { |
| 661 | /* aes_task will not finish it, so do it here */ |
| 662 | omap_aes_finish_req(dd, err); |
| 663 | tasklet_schedule(&dd->queue_task); |
| 664 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 665 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 666 | return ret; /* return ret, which is enqueue return value */ |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 667 | } |
| 668 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 669 | static void omap_aes_done_task(unsigned long data) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 670 | { |
| 671 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 672 | void *buf_in, *buf_out; |
| 673 | int pages; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 674 | |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 675 | pr_debug("enter done_task\n"); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 676 | |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 677 | if (!dd->pio_only) { |
| 678 | dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len, |
| 679 | DMA_FROM_DEVICE); |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 680 | dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE); |
| 681 | dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, |
| 682 | DMA_FROM_DEVICE); |
Joel Fernandes | 98837ab | 2013-08-17 21:42:30 -0500 | [diff] [blame] | 683 | omap_aes_crypt_dma_stop(dd); |
| 684 | } |
Joel Fernandes | 6242332 | 2013-08-17 21:42:32 -0500 | [diff] [blame] | 685 | |
| 686 | if (dd->sgs_copied) { |
| 687 | buf_in = sg_virt(&dd->in_sgl); |
| 688 | buf_out = sg_virt(&dd->out_sgl); |
| 689 | |
| 690 | sg_copy_buf(buf_out, dd->orig_out, 0, dd->total_save, 1); |
| 691 | |
| 692 | pages = get_order(dd->total_save); |
| 693 | free_pages((unsigned long)buf_in, pages); |
| 694 | free_pages((unsigned long)buf_out, pages); |
| 695 | } |
| 696 | |
Joel Fernandes | 4b645c9 | 2013-08-17 21:42:25 -0500 | [diff] [blame] | 697 | omap_aes_finish_req(dd, 0); |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 698 | omap_aes_handle_queue(dd, NULL); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 699 | |
| 700 | pr_debug("exit\n"); |
| 701 | } |
| 702 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 703 | static void omap_aes_queue_task(unsigned long data) |
| 704 | { |
| 705 | struct omap_aes_dev *dd = (struct omap_aes_dev *)data; |
| 706 | |
| 707 | omap_aes_handle_queue(dd, NULL); |
| 708 | } |
| 709 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 710 | static int omap_aes_crypt(struct ablkcipher_request *req, unsigned long mode) |
| 711 | { |
| 712 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx( |
| 713 | crypto_ablkcipher_reqtfm(req)); |
| 714 | struct omap_aes_reqctx *rctx = ablkcipher_request_ctx(req); |
| 715 | struct omap_aes_dev *dd; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 716 | |
| 717 | pr_debug("nbytes: %d, enc: %d, cbc: %d\n", req->nbytes, |
| 718 | !!(mode & FLAGS_ENCRYPT), |
| 719 | !!(mode & FLAGS_CBC)); |
| 720 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 721 | if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { |
| 722 | pr_err("request size is not exact amount of AES blocks\n"); |
| 723 | return -EINVAL; |
| 724 | } |
| 725 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 726 | dd = omap_aes_find_dev(ctx); |
| 727 | if (!dd) |
| 728 | return -ENODEV; |
| 729 | |
| 730 | rctx->mode = mode; |
| 731 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 732 | return omap_aes_handle_queue(dd, req); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 733 | } |
| 734 | |
| 735 | /* ********************** ALG API ************************************ */ |
| 736 | |
| 737 | static int omap_aes_setkey(struct crypto_ablkcipher *tfm, const u8 *key, |
| 738 | unsigned int keylen) |
| 739 | { |
| 740 | struct omap_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 741 | |
| 742 | if (keylen != AES_KEYSIZE_128 && keylen != AES_KEYSIZE_192 && |
| 743 | keylen != AES_KEYSIZE_256) |
| 744 | return -EINVAL; |
| 745 | |
| 746 | pr_debug("enter, keylen: %d\n", keylen); |
| 747 | |
| 748 | memcpy(ctx->key, key, keylen); |
| 749 | ctx->keylen = keylen; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 750 | |
| 751 | return 0; |
| 752 | } |
| 753 | |
| 754 | static int omap_aes_ecb_encrypt(struct ablkcipher_request *req) |
| 755 | { |
| 756 | return omap_aes_crypt(req, FLAGS_ENCRYPT); |
| 757 | } |
| 758 | |
| 759 | static int omap_aes_ecb_decrypt(struct ablkcipher_request *req) |
| 760 | { |
| 761 | return omap_aes_crypt(req, 0); |
| 762 | } |
| 763 | |
| 764 | static int omap_aes_cbc_encrypt(struct ablkcipher_request *req) |
| 765 | { |
| 766 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CBC); |
| 767 | } |
| 768 | |
| 769 | static int omap_aes_cbc_decrypt(struct ablkcipher_request *req) |
| 770 | { |
| 771 | return omap_aes_crypt(req, FLAGS_CBC); |
| 772 | } |
| 773 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 774 | static int omap_aes_ctr_encrypt(struct ablkcipher_request *req) |
| 775 | { |
| 776 | return omap_aes_crypt(req, FLAGS_ENCRYPT | FLAGS_CTR); |
| 777 | } |
| 778 | |
| 779 | static int omap_aes_ctr_decrypt(struct ablkcipher_request *req) |
| 780 | { |
| 781 | return omap_aes_crypt(req, FLAGS_CTR); |
| 782 | } |
| 783 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 784 | static int omap_aes_cra_init(struct crypto_tfm *tfm) |
| 785 | { |
Joel A Fernandes | a3485e6 | 2013-05-28 19:02:55 -0500 | [diff] [blame] | 786 | struct omap_aes_dev *dd = NULL; |
Nishanth Menon | f7b2b5d | 2013-12-03 19:43:13 -0600 | [diff] [blame] | 787 | int err; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 788 | |
Joel A Fernandes | a3485e6 | 2013-05-28 19:02:55 -0500 | [diff] [blame] | 789 | /* Find AES device, currently picks the first device */ |
| 790 | spin_lock_bh(&list_lock); |
| 791 | list_for_each_entry(dd, &dev_list, list) { |
| 792 | break; |
| 793 | } |
| 794 | spin_unlock_bh(&list_lock); |
| 795 | |
Nishanth Menon | f7b2b5d | 2013-12-03 19:43:13 -0600 | [diff] [blame] | 796 | err = pm_runtime_get_sync(dd->dev); |
| 797 | if (err < 0) { |
| 798 | dev_err(dd->dev, "%s: failed to get_sync(%d)\n", |
| 799 | __func__, err); |
| 800 | return err; |
| 801 | } |
| 802 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 803 | tfm->crt_ablkcipher.reqsize = sizeof(struct omap_aes_reqctx); |
| 804 | |
| 805 | return 0; |
| 806 | } |
| 807 | |
| 808 | static void omap_aes_cra_exit(struct crypto_tfm *tfm) |
| 809 | { |
Joel A Fernandes | a3485e6 | 2013-05-28 19:02:55 -0500 | [diff] [blame] | 810 | struct omap_aes_dev *dd = NULL; |
| 811 | |
| 812 | /* Find AES device, currently picks the first device */ |
| 813 | spin_lock_bh(&list_lock); |
| 814 | list_for_each_entry(dd, &dev_list, list) { |
| 815 | break; |
| 816 | } |
| 817 | spin_unlock_bh(&list_lock); |
| 818 | |
| 819 | pm_runtime_put_sync(dd->dev); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 820 | } |
| 821 | |
| 822 | /* ********************** ALGS ************************************ */ |
| 823 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 824 | static struct crypto_alg algs_ecb_cbc[] = { |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 825 | { |
| 826 | .cra_name = "ecb(aes)", |
| 827 | .cra_driver_name = "ecb-aes-omap", |
| 828 | .cra_priority = 100, |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 829 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 830 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
| 831 | CRYPTO_ALG_ASYNC, |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 832 | .cra_blocksize = AES_BLOCK_SIZE, |
| 833 | .cra_ctxsize = sizeof(struct omap_aes_ctx), |
Dmitry Kasatkin | efce41b | 2010-11-30 10:13:32 +0200 | [diff] [blame] | 834 | .cra_alignmask = 0, |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 835 | .cra_type = &crypto_ablkcipher_type, |
| 836 | .cra_module = THIS_MODULE, |
| 837 | .cra_init = omap_aes_cra_init, |
| 838 | .cra_exit = omap_aes_cra_exit, |
| 839 | .cra_u.ablkcipher = { |
| 840 | .min_keysize = AES_MIN_KEY_SIZE, |
| 841 | .max_keysize = AES_MAX_KEY_SIZE, |
| 842 | .setkey = omap_aes_setkey, |
| 843 | .encrypt = omap_aes_ecb_encrypt, |
| 844 | .decrypt = omap_aes_ecb_decrypt, |
| 845 | } |
| 846 | }, |
| 847 | { |
| 848 | .cra_name = "cbc(aes)", |
| 849 | .cra_driver_name = "cbc-aes-omap", |
| 850 | .cra_priority = 100, |
Nikos Mavrogiannopoulos | d912bb7 | 2011-11-01 13:39:56 +0100 | [diff] [blame] | 851 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 852 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
| 853 | CRYPTO_ALG_ASYNC, |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 854 | .cra_blocksize = AES_BLOCK_SIZE, |
| 855 | .cra_ctxsize = sizeof(struct omap_aes_ctx), |
Dmitry Kasatkin | efce41b | 2010-11-30 10:13:32 +0200 | [diff] [blame] | 856 | .cra_alignmask = 0, |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 857 | .cra_type = &crypto_ablkcipher_type, |
| 858 | .cra_module = THIS_MODULE, |
| 859 | .cra_init = omap_aes_cra_init, |
| 860 | .cra_exit = omap_aes_cra_exit, |
| 861 | .cra_u.ablkcipher = { |
| 862 | .min_keysize = AES_MIN_KEY_SIZE, |
| 863 | .max_keysize = AES_MAX_KEY_SIZE, |
| 864 | .ivsize = AES_BLOCK_SIZE, |
| 865 | .setkey = omap_aes_setkey, |
| 866 | .encrypt = omap_aes_cbc_encrypt, |
| 867 | .decrypt = omap_aes_cbc_decrypt, |
| 868 | } |
| 869 | } |
| 870 | }; |
| 871 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 872 | static struct crypto_alg algs_ctr[] = { |
| 873 | { |
| 874 | .cra_name = "ctr(aes)", |
| 875 | .cra_driver_name = "ctr-aes-omap", |
| 876 | .cra_priority = 100, |
| 877 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | |
| 878 | CRYPTO_ALG_KERN_DRIVER_ONLY | |
| 879 | CRYPTO_ALG_ASYNC, |
| 880 | .cra_blocksize = AES_BLOCK_SIZE, |
| 881 | .cra_ctxsize = sizeof(struct omap_aes_ctx), |
| 882 | .cra_alignmask = 0, |
| 883 | .cra_type = &crypto_ablkcipher_type, |
| 884 | .cra_module = THIS_MODULE, |
| 885 | .cra_init = omap_aes_cra_init, |
| 886 | .cra_exit = omap_aes_cra_exit, |
| 887 | .cra_u.ablkcipher = { |
| 888 | .min_keysize = AES_MIN_KEY_SIZE, |
| 889 | .max_keysize = AES_MAX_KEY_SIZE, |
| 890 | .geniv = "eseqiv", |
| 891 | .ivsize = AES_BLOCK_SIZE, |
| 892 | .setkey = omap_aes_setkey, |
| 893 | .encrypt = omap_aes_ctr_encrypt, |
| 894 | .decrypt = omap_aes_ctr_decrypt, |
| 895 | } |
| 896 | } , |
| 897 | }; |
| 898 | |
| 899 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc[] = { |
| 900 | { |
| 901 | .algs_list = algs_ecb_cbc, |
| 902 | .size = ARRAY_SIZE(algs_ecb_cbc), |
| 903 | }, |
| 904 | }; |
| 905 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 906 | static const struct omap_aes_pdata omap_aes_pdata_omap2 = { |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 907 | .algs_info = omap_aes_algs_info_ecb_cbc, |
| 908 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc), |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 909 | .trigger = omap_aes_dma_trigger_omap2, |
| 910 | .key_ofs = 0x1c, |
| 911 | .iv_ofs = 0x20, |
| 912 | .ctrl_ofs = 0x30, |
| 913 | .data_ofs = 0x34, |
| 914 | .rev_ofs = 0x44, |
| 915 | .mask_ofs = 0x48, |
| 916 | .dma_enable_in = BIT(2), |
| 917 | .dma_enable_out = BIT(3), |
| 918 | .dma_start = BIT(5), |
| 919 | .major_mask = 0xf0, |
| 920 | .major_shift = 4, |
| 921 | .minor_mask = 0x0f, |
| 922 | .minor_shift = 0, |
| 923 | }; |
| 924 | |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 925 | #ifdef CONFIG_OF |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 926 | static struct omap_aes_algs_info omap_aes_algs_info_ecb_cbc_ctr[] = { |
| 927 | { |
| 928 | .algs_list = algs_ecb_cbc, |
| 929 | .size = ARRAY_SIZE(algs_ecb_cbc), |
| 930 | }, |
| 931 | { |
| 932 | .algs_list = algs_ctr, |
| 933 | .size = ARRAY_SIZE(algs_ctr), |
| 934 | }, |
| 935 | }; |
| 936 | |
| 937 | static const struct omap_aes_pdata omap_aes_pdata_omap3 = { |
| 938 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, |
| 939 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), |
| 940 | .trigger = omap_aes_dma_trigger_omap2, |
| 941 | .key_ofs = 0x1c, |
| 942 | .iv_ofs = 0x20, |
| 943 | .ctrl_ofs = 0x30, |
| 944 | .data_ofs = 0x34, |
| 945 | .rev_ofs = 0x44, |
| 946 | .mask_ofs = 0x48, |
| 947 | .dma_enable_in = BIT(2), |
| 948 | .dma_enable_out = BIT(3), |
| 949 | .dma_start = BIT(5), |
| 950 | .major_mask = 0xf0, |
| 951 | .major_shift = 4, |
| 952 | .minor_mask = 0x0f, |
| 953 | .minor_shift = 0, |
| 954 | }; |
| 955 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 956 | static const struct omap_aes_pdata omap_aes_pdata_omap4 = { |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 957 | .algs_info = omap_aes_algs_info_ecb_cbc_ctr, |
| 958 | .algs_info_size = ARRAY_SIZE(omap_aes_algs_info_ecb_cbc_ctr), |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 959 | .trigger = omap_aes_dma_trigger_omap4, |
| 960 | .key_ofs = 0x3c, |
| 961 | .iv_ofs = 0x40, |
| 962 | .ctrl_ofs = 0x50, |
| 963 | .data_ofs = 0x60, |
| 964 | .rev_ofs = 0x80, |
| 965 | .mask_ofs = 0x84, |
Joel Fernandes | 6721675 | 2013-08-17 21:42:28 -0500 | [diff] [blame] | 966 | .irq_status_ofs = 0x8c, |
| 967 | .irq_enable_ofs = 0x90, |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 968 | .dma_enable_in = BIT(5), |
| 969 | .dma_enable_out = BIT(6), |
| 970 | .major_mask = 0x0700, |
| 971 | .major_shift = 8, |
| 972 | .minor_mask = 0x003f, |
| 973 | .minor_shift = 0, |
| 974 | }; |
| 975 | |
Joel Fernandes | 1bf95cc | 2013-08-17 21:42:29 -0500 | [diff] [blame] | 976 | static irqreturn_t omap_aes_irq(int irq, void *dev_id) |
| 977 | { |
| 978 | struct omap_aes_dev *dd = dev_id; |
| 979 | u32 status, i; |
| 980 | u32 *src, *dst; |
| 981 | |
| 982 | status = omap_aes_read(dd, AES_REG_IRQ_STATUS(dd)); |
| 983 | if (status & AES_REG_IRQ_DATA_IN) { |
| 984 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); |
| 985 | |
| 986 | BUG_ON(!dd->in_sg); |
| 987 | |
| 988 | BUG_ON(_calc_walked(in) > dd->in_sg->length); |
| 989 | |
| 990 | src = sg_virt(dd->in_sg) + _calc_walked(in); |
| 991 | |
| 992 | for (i = 0; i < AES_BLOCK_WORDS; i++) { |
| 993 | omap_aes_write(dd, AES_REG_DATA_N(dd, i), *src); |
| 994 | |
| 995 | scatterwalk_advance(&dd->in_walk, 4); |
| 996 | if (dd->in_sg->length == _calc_walked(in)) { |
| 997 | dd->in_sg = scatterwalk_sg_next(dd->in_sg); |
| 998 | if (dd->in_sg) { |
| 999 | scatterwalk_start(&dd->in_walk, |
| 1000 | dd->in_sg); |
| 1001 | src = sg_virt(dd->in_sg) + |
| 1002 | _calc_walked(in); |
| 1003 | } |
| 1004 | } else { |
| 1005 | src++; |
| 1006 | } |
| 1007 | } |
| 1008 | |
| 1009 | /* Clear IRQ status */ |
| 1010 | status &= ~AES_REG_IRQ_DATA_IN; |
| 1011 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); |
| 1012 | |
| 1013 | /* Enable DATA_OUT interrupt */ |
| 1014 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x4); |
| 1015 | |
| 1016 | } else if (status & AES_REG_IRQ_DATA_OUT) { |
| 1017 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x0); |
| 1018 | |
| 1019 | BUG_ON(!dd->out_sg); |
| 1020 | |
| 1021 | BUG_ON(_calc_walked(out) > dd->out_sg->length); |
| 1022 | |
| 1023 | dst = sg_virt(dd->out_sg) + _calc_walked(out); |
| 1024 | |
| 1025 | for (i = 0; i < AES_BLOCK_WORDS; i++) { |
| 1026 | *dst = omap_aes_read(dd, AES_REG_DATA_N(dd, i)); |
| 1027 | scatterwalk_advance(&dd->out_walk, 4); |
| 1028 | if (dd->out_sg->length == _calc_walked(out)) { |
| 1029 | dd->out_sg = scatterwalk_sg_next(dd->out_sg); |
| 1030 | if (dd->out_sg) { |
| 1031 | scatterwalk_start(&dd->out_walk, |
| 1032 | dd->out_sg); |
| 1033 | dst = sg_virt(dd->out_sg) + |
| 1034 | _calc_walked(out); |
| 1035 | } |
| 1036 | } else { |
| 1037 | dst++; |
| 1038 | } |
| 1039 | } |
| 1040 | |
| 1041 | dd->total -= AES_BLOCK_SIZE; |
| 1042 | |
| 1043 | BUG_ON(dd->total < 0); |
| 1044 | |
| 1045 | /* Clear IRQ status */ |
| 1046 | status &= ~AES_REG_IRQ_DATA_OUT; |
| 1047 | omap_aes_write(dd, AES_REG_IRQ_STATUS(dd), status); |
| 1048 | |
| 1049 | if (!dd->total) |
| 1050 | /* All bytes read! */ |
| 1051 | tasklet_schedule(&dd->done_task); |
| 1052 | else |
| 1053 | /* Enable DATA_IN interrupt for next block */ |
| 1054 | omap_aes_write(dd, AES_REG_IRQ_ENABLE(dd), 0x2); |
| 1055 | } |
| 1056 | |
| 1057 | return IRQ_HANDLED; |
| 1058 | } |
| 1059 | |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1060 | static const struct of_device_id omap_aes_of_match[] = { |
| 1061 | { |
| 1062 | .compatible = "ti,omap2-aes", |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1063 | .data = &omap_aes_pdata_omap2, |
| 1064 | }, |
| 1065 | { |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1066 | .compatible = "ti,omap3-aes", |
| 1067 | .data = &omap_aes_pdata_omap3, |
| 1068 | }, |
| 1069 | { |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1070 | .compatible = "ti,omap4-aes", |
| 1071 | .data = &omap_aes_pdata_omap4, |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1072 | }, |
| 1073 | {}, |
| 1074 | }; |
| 1075 | MODULE_DEVICE_TABLE(of, omap_aes_of_match); |
| 1076 | |
| 1077 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, |
| 1078 | struct device *dev, struct resource *res) |
| 1079 | { |
| 1080 | struct device_node *node = dev->of_node; |
| 1081 | const struct of_device_id *match; |
| 1082 | int err = 0; |
| 1083 | |
| 1084 | match = of_match_device(of_match_ptr(omap_aes_of_match), dev); |
| 1085 | if (!match) { |
| 1086 | dev_err(dev, "no compatible OF match\n"); |
| 1087 | err = -EINVAL; |
| 1088 | goto err; |
| 1089 | } |
| 1090 | |
| 1091 | err = of_address_to_resource(node, 0, res); |
| 1092 | if (err < 0) { |
| 1093 | dev_err(dev, "can't translate OF node address\n"); |
| 1094 | err = -EINVAL; |
| 1095 | goto err; |
| 1096 | } |
| 1097 | |
| 1098 | dd->dma_out = -1; /* Dummy value that's unused */ |
| 1099 | dd->dma_in = -1; /* Dummy value that's unused */ |
| 1100 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1101 | dd->pdata = match->data; |
| 1102 | |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1103 | err: |
| 1104 | return err; |
| 1105 | } |
| 1106 | #else |
| 1107 | static const struct of_device_id omap_aes_of_match[] = { |
| 1108 | {}, |
| 1109 | }; |
| 1110 | |
| 1111 | static int omap_aes_get_res_of(struct omap_aes_dev *dd, |
| 1112 | struct device *dev, struct resource *res) |
| 1113 | { |
| 1114 | return -EINVAL; |
| 1115 | } |
| 1116 | #endif |
| 1117 | |
| 1118 | static int omap_aes_get_res_pdev(struct omap_aes_dev *dd, |
| 1119 | struct platform_device *pdev, struct resource *res) |
| 1120 | { |
| 1121 | struct device *dev = &pdev->dev; |
| 1122 | struct resource *r; |
| 1123 | int err = 0; |
| 1124 | |
| 1125 | /* Get the base address */ |
| 1126 | r = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1127 | if (!r) { |
| 1128 | dev_err(dev, "no MEM resource info\n"); |
| 1129 | err = -ENODEV; |
| 1130 | goto err; |
| 1131 | } |
| 1132 | memcpy(res, r, sizeof(*res)); |
| 1133 | |
| 1134 | /* Get the DMA out channel */ |
| 1135 | r = platform_get_resource(pdev, IORESOURCE_DMA, 0); |
| 1136 | if (!r) { |
| 1137 | dev_err(dev, "no DMA out resource info\n"); |
| 1138 | err = -ENODEV; |
| 1139 | goto err; |
| 1140 | } |
| 1141 | dd->dma_out = r->start; |
| 1142 | |
| 1143 | /* Get the DMA in channel */ |
| 1144 | r = platform_get_resource(pdev, IORESOURCE_DMA, 1); |
| 1145 | if (!r) { |
| 1146 | dev_err(dev, "no DMA in resource info\n"); |
| 1147 | err = -ENODEV; |
| 1148 | goto err; |
| 1149 | } |
| 1150 | dd->dma_in = r->start; |
| 1151 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1152 | /* Only OMAP2/3 can be non-DT */ |
| 1153 | dd->pdata = &omap_aes_pdata_omap2; |
| 1154 | |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1155 | err: |
| 1156 | return err; |
| 1157 | } |
| 1158 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1159 | static int omap_aes_probe(struct platform_device *pdev) |
| 1160 | { |
| 1161 | struct device *dev = &pdev->dev; |
| 1162 | struct omap_aes_dev *dd; |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1163 | struct crypto_alg *algp; |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1164 | struct resource res; |
Joel Fernandes | 1801ad9 | 2013-08-17 21:42:31 -0500 | [diff] [blame] | 1165 | int err = -ENOMEM, i, j, irq = -1; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1166 | u32 reg; |
| 1167 | |
Joel Fernandes | 05007c1 | 2013-08-17 21:42:33 -0500 | [diff] [blame] | 1168 | dd = devm_kzalloc(dev, sizeof(struct omap_aes_dev), GFP_KERNEL); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1169 | if (dd == NULL) { |
| 1170 | dev_err(dev, "unable to alloc data struct.\n"); |
| 1171 | goto err_data; |
| 1172 | } |
| 1173 | dd->dev = dev; |
| 1174 | platform_set_drvdata(pdev, dd); |
| 1175 | |
| 1176 | spin_lock_init(&dd->lock); |
| 1177 | crypto_init_queue(&dd->queue, OMAP_AES_QUEUE_LENGTH); |
| 1178 | |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1179 | err = (dev->of_node) ? omap_aes_get_res_of(dd, dev, &res) : |
| 1180 | omap_aes_get_res_pdev(dd, pdev, &res); |
| 1181 | if (err) |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1182 | goto err_res; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1183 | |
Laurent Navet | 3086228 | 2013-05-02 14:00:38 +0200 | [diff] [blame] | 1184 | dd->io_base = devm_ioremap_resource(dev, &res); |
| 1185 | if (IS_ERR(dd->io_base)) { |
| 1186 | err = PTR_ERR(dd->io_base); |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1187 | goto err_res; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1188 | } |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1189 | dd->phys_base = res.start; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1190 | |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1191 | pm_runtime_enable(dev); |
Nishanth Menon | f7b2b5d | 2013-12-03 19:43:13 -0600 | [diff] [blame] | 1192 | err = pm_runtime_get_sync(dev); |
| 1193 | if (err < 0) { |
| 1194 | dev_err(dev, "%s: failed to get_sync(%d)\n", |
| 1195 | __func__, err); |
| 1196 | goto err_res; |
| 1197 | } |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1198 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1199 | omap_aes_dma_stop(dd); |
| 1200 | |
| 1201 | reg = omap_aes_read(dd, AES_REG_REV(dd)); |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1202 | |
| 1203 | pm_runtime_put_sync(dev); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1204 | |
Mark A. Greer | 0d35583 | 2013-01-08 11:57:46 -0700 | [diff] [blame] | 1205 | dev_info(dev, "OMAP AES hw accel rev: %u.%u\n", |
| 1206 | (reg & dd->pdata->major_mask) >> dd->pdata->major_shift, |
| 1207 | (reg & dd->pdata->minor_mask) >> dd->pdata->minor_shift); |
| 1208 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 1209 | tasklet_init(&dd->done_task, omap_aes_done_task, (unsigned long)dd); |
| 1210 | tasklet_init(&dd->queue_task, omap_aes_queue_task, (unsigned long)dd); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1211 | |
| 1212 | err = omap_aes_dma_init(dd); |
Joel Fernandes | 1801ad9 | 2013-08-17 21:42:31 -0500 | [diff] [blame] | 1213 | if (err && AES_REG_IRQ_STATUS(dd) && AES_REG_IRQ_ENABLE(dd)) { |
| 1214 | dd->pio_only = 1; |
| 1215 | |
| 1216 | irq = platform_get_irq(pdev, 0); |
| 1217 | if (irq < 0) { |
| 1218 | dev_err(dev, "can't get IRQ resource\n"); |
| 1219 | goto err_irq; |
| 1220 | } |
| 1221 | |
Joel Fernandes | bce2a22 | 2013-08-17 21:42:34 -0500 | [diff] [blame] | 1222 | err = devm_request_irq(dev, irq, omap_aes_irq, 0, |
Joel Fernandes | 1801ad9 | 2013-08-17 21:42:31 -0500 | [diff] [blame] | 1223 | dev_name(dev), dd); |
| 1224 | if (err) { |
| 1225 | dev_err(dev, "Unable to grab omap-aes IRQ\n"); |
| 1226 | goto err_irq; |
| 1227 | } |
| 1228 | } |
| 1229 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1230 | |
| 1231 | INIT_LIST_HEAD(&dd->list); |
| 1232 | spin_lock(&list_lock); |
| 1233 | list_add_tail(&dd->list, &dev_list); |
| 1234 | spin_unlock(&list_lock); |
| 1235 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1236 | for (i = 0; i < dd->pdata->algs_info_size; i++) { |
| 1237 | for (j = 0; j < dd->pdata->algs_info[i].size; j++) { |
| 1238 | algp = &dd->pdata->algs_info[i].algs_list[j]; |
| 1239 | |
| 1240 | pr_debug("reg alg: %s\n", algp->cra_name); |
| 1241 | INIT_LIST_HEAD(&algp->cra_list); |
| 1242 | |
| 1243 | err = crypto_register_alg(algp); |
| 1244 | if (err) |
| 1245 | goto err_algs; |
| 1246 | |
| 1247 | dd->pdata->algs_info[i].registered++; |
| 1248 | } |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1249 | } |
| 1250 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1251 | return 0; |
| 1252 | err_algs: |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1253 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
| 1254 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) |
| 1255 | crypto_unregister_alg( |
| 1256 | &dd->pdata->algs_info[i].algs_list[j]); |
Joel Fernandes | bce2a22 | 2013-08-17 21:42:34 -0500 | [diff] [blame] | 1257 | if (!dd->pio_only) |
Joel Fernandes | 1801ad9 | 2013-08-17 21:42:31 -0500 | [diff] [blame] | 1258 | omap_aes_dma_cleanup(dd); |
| 1259 | err_irq: |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 1260 | tasklet_kill(&dd->done_task); |
| 1261 | tasklet_kill(&dd->queue_task); |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1262 | pm_runtime_disable(dev); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1263 | err_res: |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1264 | dd = NULL; |
| 1265 | err_data: |
| 1266 | dev_err(dev, "initialization failed.\n"); |
| 1267 | return err; |
| 1268 | } |
| 1269 | |
| 1270 | static int omap_aes_remove(struct platform_device *pdev) |
| 1271 | { |
| 1272 | struct omap_aes_dev *dd = platform_get_drvdata(pdev); |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1273 | int i, j; |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1274 | |
| 1275 | if (!dd) |
| 1276 | return -ENODEV; |
| 1277 | |
| 1278 | spin_lock(&list_lock); |
| 1279 | list_del(&dd->list); |
| 1280 | spin_unlock(&list_lock); |
| 1281 | |
Mark A. Greer | f9fb69e | 2013-01-08 11:57:47 -0700 | [diff] [blame] | 1282 | for (i = dd->pdata->algs_info_size - 1; i >= 0; i--) |
| 1283 | for (j = dd->pdata->algs_info[i].registered - 1; j >= 0; j--) |
| 1284 | crypto_unregister_alg( |
| 1285 | &dd->pdata->algs_info[i].algs_list[j]); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1286 | |
Dmitry Kasatkin | 21fe976 | 2010-11-30 10:13:29 +0200 | [diff] [blame] | 1287 | tasklet_kill(&dd->done_task); |
| 1288 | tasklet_kill(&dd->queue_task); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1289 | omap_aes_dma_cleanup(dd); |
Mark A. Greer | 5946c4a | 2013-01-08 11:57:40 -0700 | [diff] [blame] | 1290 | pm_runtime_disable(dd->dev); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1291 | dd = NULL; |
| 1292 | |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
Mark A. Greer | 0635fb3 | 2013-01-08 11:57:41 -0700 | [diff] [blame] | 1296 | #ifdef CONFIG_PM_SLEEP |
| 1297 | static int omap_aes_suspend(struct device *dev) |
| 1298 | { |
| 1299 | pm_runtime_put_sync(dev); |
| 1300 | return 0; |
| 1301 | } |
| 1302 | |
| 1303 | static int omap_aes_resume(struct device *dev) |
| 1304 | { |
| 1305 | pm_runtime_get_sync(dev); |
| 1306 | return 0; |
| 1307 | } |
| 1308 | #endif |
| 1309 | |
Jingoo Han | ea7b284 | 2014-02-27 20:31:38 +0900 | [diff] [blame] | 1310 | static SIMPLE_DEV_PM_OPS(omap_aes_pm_ops, omap_aes_suspend, omap_aes_resume); |
Mark A. Greer | 0635fb3 | 2013-01-08 11:57:41 -0700 | [diff] [blame] | 1311 | |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1312 | static struct platform_driver omap_aes_driver = { |
| 1313 | .probe = omap_aes_probe, |
| 1314 | .remove = omap_aes_remove, |
| 1315 | .driver = { |
| 1316 | .name = "omap-aes", |
| 1317 | .owner = THIS_MODULE, |
Mark A. Greer | 0635fb3 | 2013-01-08 11:57:41 -0700 | [diff] [blame] | 1318 | .pm = &omap_aes_pm_ops, |
Mark A. Greer | bc69d12 | 2013-01-08 11:57:44 -0700 | [diff] [blame] | 1319 | .of_match_table = omap_aes_of_match, |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1320 | }, |
| 1321 | }; |
| 1322 | |
Sachin Kamat | 94e51df | 2013-03-04 15:09:42 +0530 | [diff] [blame] | 1323 | module_platform_driver(omap_aes_driver); |
Dmitry Kasatkin | 537559a | 2010-09-03 19:16:02 +0800 | [diff] [blame] | 1324 | |
| 1325 | MODULE_DESCRIPTION("OMAP AES hw acceleration support."); |
| 1326 | MODULE_LICENSE("GPL v2"); |
| 1327 | MODULE_AUTHOR("Dmitry Kasatkin"); |
| 1328 | |